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研究生:葉佳根
研究生(外文):Chia-Ken Yeh
論文名稱:寬頻或寬軸比天線之研究
論文名稱(外文):A Study on Wide Impedance Band and/or Wide Axial-Ratio Band Antennas
指導教授:鄧聖明蔡慶龍蔡慶龍引用關係柏小松
指導教授(外文):Sheng-Ming DengChing-Long TsaiSheau-Shong Bor
學位類別:碩士
校院名稱:逢甲大學
系所名稱:電機工程所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:98
中文關鍵詞:介質共振天線圓極化天線倒F型天線共面波導
外文關鍵詞:dielectric resonator antennacircular polarization antennacoplanar-waveguideinverted-F antenna
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本論文提出三種天線,分別為共面波導饋入之倒F型天線、共面波導饋入負載金屬微片之介質共振天線以及同軸饋入矩形環狀圓極化天線。首先,在倒F型天線方面,我們利用簡單的操作機制分別獨立控制兩個頻帶,以上端彎折金屬片共振出低頻模態,而饋入線末端開槽共振出高頻模態,成功的達到操作於IEEE 802.11a/b/g無線區域網路規範的應用頻帶,頻寬分別為400 MHz以及500 MHz,若加以適當的調整各參數,我們可以將此兩頻帶相互靠近,進而達到一頻寬達1190 MHz的寬頻操作天線。在第二部分,我們改用介質共振天線負載金屬微片,利用介質共振天線高增益、高輻射效率的優點以及平板天線高頻寬的特性相互結合,達到一個高增益的雙頻操作天線,所得頻寬分別為120 MHz及670 MHz,在增益方面最高可達8.1 dBi。最後,我們利用矩形環狀微帶天線以產生出兩個不同且正交的極化方向,而成功的達到寬頻寬、高增益的圓極化操作天線,且包含IEEE 802.11b/g無線區域網路應用頻帶。
In this thesis, coplanar-waveguide feed planar inverted-F antenna, coplanar-waveguide feed dielectric resonator loaded patch antenna and coaxial feed square - ring antenna for circular polarization are presented. In the planar inverted-F antenna, we utilize simple operation to control two individual frequency bands. the inverted patch is control the low band mode and the end coupling slot is control the high band mode. Measured bandwidth for IEEE 802.11 b/g is 400 MHz, and that for IEEE 802.11a is 500 MHz, respectively. Additionally, through the suitable adjustment, a wider bandwidth of 1190 MHz can be obtained with center frequency of 4 GHz. In the second part, the dielectric resonator is used to get high gain and high radiation efficiency, and use patch to get high impedance bandwidth. We can get dual band operation with the impedance bandwidth of 120 MHz and 670 MHz. we can reach as high as 8.1 dBi in gain. In finally, we created two different and orthogonal polarization by a square – ring. Then we can get high bandwidth and high gain for a circular polarization antenna. The bandwidth can be use in IEEE 802.11b/g.
中文摘要.....................................................................................................i
英文摘要....................................................................................................ii
致謝...........................................................................................................iii
目錄...........................................................................................................iv
圖目錄.......................................................................................................vi
表目錄.....................................................................................................viii
縮寫及符號對照表...................................................................................ix
第一章 序論..............................................................................................1
1.1 研究動機...............................................................................1
1.2 內容概述...............................................................................2
第二章 共面波導饋入有限接地面之寬頻倒F型天線...........................4
2.1 概述.......................................................................................4
2.2 共面波導饋入有限接地面之雙頻倒F型天線....................8
2.2.1 天線設計....................................................................8
2.2.2 實驗結果與討論........................................................9
2.3 共面波導饋入有限接地面之寬頻倒F型天線..................10
2.3.1 天線設計..................................................................10
2.3.2 實驗結果與討論......................................................11
第三章 共面波導饋入負載金屬微片之高增益介質共振天線............26
3.1 概述.....................................................................................26
3.2 天線設計.............................................................................28
3.3 實驗結果與討論.................................................................29
第四章 同軸饋入矩形環狀圓極化天線................................................42
4.1 概述.....................................................................................42
4.2 同軸饋入開路矩形環狀圓極化天線.................................44
4.2.1 天線設計..................................................................44
4.2.2 實驗結果與討論......................................................45
4.3 同軸饋入短路矩形環狀圓極化天線.................................46
4.3.1 天線設計..................................................................46
4.3.2 實驗結果與討論......................................................47
第五章 結論............................................................................................78
參考文獻..................................................................................................80
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